Blood flow assisting portable arm support

ABSTRACT

A portable arm support can be secured to an arm of a patient, for instance during a medical procedure (e.g., filtration of blood of the patient). The arm support can inhibit movement of the arm of the patient in one or more degrees of freedom (e.g., elevation, abduction, adduction, flexion, or the like). In some examples, the arm support includes a cuff and abase. In another example, the arm support includes an elongated member. In yet another example, the arm support includes a constricting band. The arm support can help maintain blood flow in the arm of the patient, and can help protect a catheter inserted into the arm of the patient (or protect other medical equipment proximate to the patient).

CLAIM OF PRIORITY

This patent application claims the benefit of priority of Lerner et al.,U.S. Provisional Patent Application Ser. No. 62/787,090, titled “BLOODFLOW ASSISTING PORTABLE ARM SUPPORT,” filed on Dec. 31, 2018 (AttorneyDocket No. 4567.026PRV); and Lerner et al., U.S. Provisional PatentApplication Ser. No. 62/787,106, titled “BLOOD FILTRATION SYSTEMS,”filed on Dec. 31, 2018 (Attorney Docket No. 4567.027PRV), the benefit ofpriority of each of which is claimed hereby, and each of which areincorporated by reference herein in its entirety.

CROSS-REFERENCE TO RELATED PATENT DOCUMENTS

This patent application is also related to the application titled “BLOODFILTRATION SYSTEMS” by Lerner et al., filed on Dec. 31, 2018 (AttorneyDocket No. 4567.027PRV), which is hereby incorporated by referenceherein in its entirety.

TECHNICAL FIELD

This document pertains generally, but not by way of limitation, tomedical devices.

BACKGROUND

A blood filtration system can provide blood filtration therapy, forinstance by removing blood from the blood stream (e.g., venouscirculation) of a patient and separating plasma water and electrolytesfrom erythrocytes red blood cells) and other blood constituents with afilter. The system can convey the filtered blood constituents (e.g.,plasma water and electrolytes) to a reservoir (e.g., a bag) fordisposal. The balance of the plasma water, the erythrocytes, and otherblood constituents are returned to the patient's blood stream. Onceblood is withdrawn from the blood stream and makes contact withextracorporeal components of the blood filtration system (e.g., tubing,the filter, or the like), a potential exists for clots to form withinthe extracorporeal components, leading to an increase in resistancewithin the components (e.g., the filter), and potentially clogging(e.g., occluding) the components. While not harmful to the patient, theincrease in resistance or clotting could necessitate replacement of oneor more of the extracorporeal components.

SUMMARY

The present inventors have recognized, among other things, that aproblem to be solved can include improving blood flow throughextracorporeal (e.g., outside of a body of a patient) components of ablood filtration system. Additionally, the present inventors haverecognized, among other things, that a problem to be solved can includereducing compression of veins of the patient. Further, the presentinventors have recognized, among other things, that a problem to besolved can include discouraging a patient from moving an arm of thepatient. Still further, the present inventors have recognized, amongother things, that a problem to be solved can include reducingcompression of the extracorporeal components of the blood filtrationsystem.

Sustained occlusion (e.g., partial or complete blockage) of a patient'sblood stream (e.g., a vein) can lead to clotting of blood and a loss ofthe filter or other extracorporeal components (e.g., one or more tubes,a blood circuit, or the like), for instance because flow within theextracorporeal components can be reduced when the location of a catheterchanges with respect to the vasculature where the catheter ispositioned. In an example, a patient can have a catheter inserted intovasculature, for instance a vein in a peripheral portion of thepatient's body (e.g., in a vein within the arm of the patient, forexample a basilic vein, cephalic vein, brachial vein, or the like). Thevein in the peripheral portion of the patient has a reduced blood flowin comparison to a centrally located vein (e.g., subclavian vein,internal jugular veins, or the like). Additionally, the vein in theperipheral portion of the patient can be occluded and blood flow withinthe vein can be reduced. For instance, a patient can lay on its arm andaccordingly reduce blood flow in the arm (e.g., reduce venous return inthe arm). In another example, the patient can bend its elbow (e.g., aflexion movement) and accordingly reduce blood flow in the arm, forinstance because a catheter is kinked, or a vein is compressed due tothe patient bending its elbow.

Sustained occlusion (e.g., partial or complete blockage) of bloodflowing through the extracorporeal components (e.g., a filter or bloodtransport lines in communication with the filter) can lead to clottingand a loss of the filter or other extracorporeal components. Forinstance, the patient can move (e.g., roll) onto its side and in theprocess of moving, compress a blood line in communication with the bloodfiltration system. Accordingly, patient movement can reduce blood flowin the extracorporeal components and lead to clotting of blood and aloss of the filter or other extracorporeal components.

The present subject matter can help provide a solution to this problem,such as by providing a portable arm support for a patient undergoing amedical procedure. The portable arm support can include a cuff sized andshaped to engage with an arm of the patient. The portable arm supportcan include a base coupled with the cuff. The base can be configured toengage with the patient or a foundation surface, The cuff and the basecooperate to position the arm of the patient away from a midline of abody (e.g., a midline of a torso) of the patient (e.g., abducting and/orelevating the arm).

The portable arm support can help maintain continuous blood flow throughthe patient's blood stream, and the extracorporeal components of theblood filtration system. In an example, the portable arm support canencourage the patient to maintain a preferred body position, for examplelocating the arm of the patient away from a midline of the body of thepatient. For instance, the portable arm support can elevate the arm ofthe patient (e.g., 15 degrees relative to a foundation surface, such asa bed, couch, or the like). Additionally, the portable arm support canabduct the arm of the patient (e.g., locate the arm away from the torsoof the patient). Locating the arm of the patient away from the midlineof the patient can help improve blood flow within the blood stream(e.g., the basilic vein) and improved blood flow within the blood streamcan reduce clotting within the extracorporeal components of the bloodfiltration system and accordingly improve the performance of the bloodfiltration system.

This summary is intended to provide a summary of subject matter of thepresent patent application. It is not intended to provide an exclusiveor exhaustive explanation of the invention. The detailed description isincluded to provide further information about the present patentapplication.

BRIEF DESCRIPTION OF THE DRAWINGS

The patent or application file contains at least one drawing executed incolor. Copies of this patent or patent application publication withcolor drawing(s) will be provided by the Office upon request and paymentof the necessary fee.

In the drawings, which are not necessarily drawn to scale, like numeralscan describe similar components in different views. Like numerals havingdifferent letter suffixes can represent different instances of similarcomponents. The drawings illustrate generally, by way of example, butnot by way of limitation, various embodiments discussed in the presentdocument.

FIGS. 1A-1C show an example of a first portable arm support.

FIGS. 2A-2C show an example of a second portable arm support.

FIGS. 2D-2F show another example of the second portable arm support.

FIGS. 3A-3C show an example of a third portable arm support.

FIGS. 4A-4C show an example of a fourth portable arm support.

FIGS. 5A-5C show an example of a fifth portable arm support.

FIGS. 6A-6C show an example of a sixth portable arm support.

FIGS. 7A-7C show an example of a seventh portable arm support.

FIGS. 8A-8C show an example of an eighth portable arm support.

FIGS. 9A-9E show an example of a ninth portable arm support.

DETAILED DESCRIPTION

FIGS. 1A-1C show an example of a first portable arm support 100. Theportable arm support 100 can have dimensions less than a size of an armof a patient. In some examples, the portable arm support can weigh lessthan 30 pounds. The portable arm support 100 can include reusablecomponents, or can be disposable (e.g., single-use). The portable armsupport can be attached to a limb of the patient, for example an arm180.

The arm support 100 can include a cuff 110, and the cuff 110 can besized and shaped to engage with the arm 180 of a patient. For instance,the cuff 110 can include an arm recess 120. The cuff 110 can be curvedto provide the arm recess 120. Additionally, the cuff 110 can includeone or more straps 130 to secure (e.g., attach, couple, affix, fasten,hold, or the like) the cuff 110 to the arm 180 of the patient. A firstend (e.g., fixed end) of the strap 130 can be coupled to the cuff 110,and a second end (e.g., a free end) of the strap 130 can be selectivelycoupled with the cuff 110. For instance, the strap 130 can include ahook and loop fastener, and the hook and loop fastener of the strap 130can engage with a corresponding hook and loop fastener of the cuff 110to selectively couple the strap 130 with the cuff 110. The arm 180 ofthe patient can be positioned in the arm recess 120 and the strap 130can be engaged around the arm 180 and coupled with the cuff 110 tosecure the cuff 110 to the arm 180 of the patient.

The portable arm support 100 can include a base 140, and the base 140can be configured to engage with the patient (e.g., a torso of thepatient) and/or a foundation surface (e.g., a bed, couch, gurney, or thelike). For instance, the base 140 can include a body recess 150. Thebase 140 can be curved to provide the body recess 150. The body recess150 can receive a portion of the patient (e.g., the torso) and engagewith the patient.

The cuff 110 can include a positioning member 160, and the positioningmember 160 can extend from the cuff 110. The positioning member 160 canhave a curved profile, for example the positioning member 160 can besemicircular in shape (e.g., U-shaped, horseshoe shaped, or the like).In some examples, the positioning member 160 can be adjustably coupledwith the base 140 to space the cuff 110 apart from the base 140 andlocate the cuff 110 in a specified orientation. For instance, the cuff110 can be oriented to abduct and/or elevate the arm 180 of the patientwhen the positioning member 160 is coupled with the base 140. In thisexample, when the cuff 110 is coupled with the base 140, the positioningmember 160 can be sized and shaped to orient the arm recess 120 awayfrom the body recess 150. For instance, the arm recess 120 can opentoward a first direction, the body recess 150 can open toward a seconddirection, and the first direction can be different than the seconddirection (e.g., 30 degrees, 90 degrees, 180 degrees, or the like). Asshown in FIGS. 1B and 1C, the arm recess 120 opens in a directionopposite to the body recess 150.

As described herein, the cuff 110 can be adjustably coupled with thebase 140. Accordingly, the cuff 110 can be repositionable with respectto the base 140 to locate the cuff 110 in a specified orientation, Forinstance, the positioning member 160 can include a first coupling member170A (e.g., a hook and loop fastener, adhesive, or the like), and thebase 140 can include a second coupling member 17013 that correspondswith the first coupling member 170A to couple adjustably couple the cuff110 (or the positioning member 160) with the base 140. The couplingmembers 170A, 170B can selectively couple to allow the cuff 110 to berepositioned with respect to the base 140. In another example, theportable arm support 100 can include snap fasteners that facilitaterepositioning the cuff 110 with respect to the base 140.

As described herein, the portable arm support 100 can include the cuff110 and the base 140. The cuff 110 and the base 140 can cooperate toposition the arm 180 away from a midline of a body of the patient. In anexample, the portable arm support 100 can abduct the arm 180. In anotherexample, the portable arm support 100 can elevate the arm 180.Positioning the arm 180 away from the midline of the body can improveblood flow within the blood stream (e.g., venous system) of the patient.Improved blood flow within the blood stream can improve blood flow in ablood filtration system (e.g., an ultrafiltration system configured toseparate plasma water and electrolytes from erythrocytes). Accordingly,portable arm support 100 improves blood flow in the blood filtrationsystem and reduces clotting to improve the performance of the bloodfiltration system.

Additionally, the portable arm support 100 can protect a catheter 190inserted into the arm 180 of the patient. For instance, the patient canmove and interact with (e.g., pull on, twist, or the like) the catheter190 (e.g., if the patient rolls over onto its side). The interactionwith the catheter 190 can dislodge the catheter 190 from the arm 180 ofthe patient and can require the catheter 190 to be reinserted into thearm 180. In another example, the patient can compress the catheter 190(or the tubing coupled with the catheter 190), and the compression ofthe catheter 190 can reduce blood flow within the catheter 190 and theblood filtration system. Movement of the arm 180 of the patient canchange the location of the catheter 190 (e.g., a catheter tip) withrespect to vasculature of the patient (e.g., a wall of a brachial vein).For instance, movement of the arm 180 can cause a tip of the catheter190 to move from the center of a vein, the tip can engage with a wall ofthe vein, and the movement toward the wall (or the engagement with thewall) can occlude flow in the arm 180, or a blood filtration system(e.g., extracorporeal components, for instance a blood circuit, afilter, or the like).

The portable arm support 100 (e.g., the cuff 110) can protect (e.g.,cover, shield, obscure, or the like) the catheter 190 from beinginteracted with or compressed. The portable arm support 100 can inhibitdislodging of the catheter 190 or maintain blood flow within thecatheter 190. The portable arm support 100 can help reduce movement ofthe catheter within the vasculature of a patient, for instance to ensurethat a tip of the catheter 190 does not move relative to the vasculatureof the patient. in an example, movement of the tip of the catheter 190can occlude blood flow in the catheter 190. Maintaining the location ofthe catheter 190 with respect to the vasculature of the patient caninhibit occlusion of the catheter 190. Accordingly, the portable armsupport 100 (or other portable arm supports described herein, forexample the second arm support 200) improves blood flow in the bloodfiltration system and reduces instances of labor-intensive reinsertionof the catheter 190.

FIGS. 2A-2C show an example of a second portable arm support 200. Theportable arm support 200 can include a first cuff 110A and a second cuff110B. The cuffs 110A, 110B can be interconnected with a hinge member210. The hinge member 210 can allow the cuffs 110A, 110B to pivotrelative to each other. in another example, the hinge member 210connects the cuffs 110A, 110B together at a fixed angle (e.g., 15degrees, 20 degrees, 30 degrees, or the like).

The portable arm support 200 can include a first base section 140A and asecond base section 140B. The base sections 140A, 140B include a basesection 142 (e.g., a flat bottom, or the like). One or more side members144 can be coupled with the base section 142, and the side members 144can extend from the base support, for instance at an angle. In anexample, the side members 144 can slant toward each other, for instanceto provide a wedge or define the arm recess 120.

The base section 140A can be angled relative to the base section 140B.An angled spacer 220 can be located between the base sections 140A,140B, and the angled spacer 220 can interconnect the base sections 140A,140B at a fixed angle. In another example, the base sections 140A, 140Bare interconnected with a hinge, and the base section 140A can beconfigured to pivot relative to the base section 140B. Accordingly, theangle between the base sections 140A, 140B can be variable according tothe pivoting of the base sections 140A, 140B. The hinge member 210 canfacilitate coupling the cuffs 110A, 110B with the base sections 140A,140B so that the cuffs 110A, 110B conform to (e.g., match with) theangle between the base sections 140A, 140B.

The base sections 140A, 140B can include coupling members 170. In oneexample, the coupling members 170 can include hook and loop fastenersthat engage with the cuffs 110A, 110B to selectively couple the cuffs110A, 110B with the base sections 140A, 140B. In another example, thecoupling members 170 can include an adhesive, and the adhesive canengage with (e.g., adhere to) the cuffs 110A, 110B to selectively couplethe base sections 140A, 140B. In some examples, the base sections 140A,140B include a non-porous material, and are reusable. The cuffs 110A,110B can include a cushioning material and can be single-use. In someexamples, the cuffs 110A, 110B can inflate, for instance to provide acushion for the arm 180 of the patient.

As shown in FIGS. 2B and 2C, the portable arm support 200 can include anarm recess 120, and the arm recess 120 can be sized and shaped toreceive the arm 180 of the patient. The cuffs 110A, 110B and the basesections 140A, 140B can cooperate to position the arm 180 away from amidline of a body of the patient. In an example, the portable armsupport 100 can abduct the arm 180. In another example, the portable armsupport 100 can elevate the arm 180. Positioning the arm 180 away fromthe midline of the body can improve blood flow within the blood stream(e.g., venous system) of the patient. Improved blood flow within theblood stream can improve blood flow in a blood filtration system (e.g.,an ultrafiltrate system configured to separate plasma water andelectrolytes from erythrocytes). Accordingly, portable arm support 200improves blood flow in the blood filtration system and reduces clottingto improve the performance of the blood filtration system.

Additionally, because the base sections 140A, 140B are rigid, theportable arm support 200 maintains the position of the arm 180 of thepatient in a specified orientation. When the arm 180 is in the armrecess 120, the portable arm support 200 can prevent arm adduction, andaccordingly improve the blood flow of the patient. Further, the portablearm support 200 can help inhibit elbow flexion of the patient andimprove the blood flow of the patient. In some examples the arm support200 can be adapted to be a leg support, and the leg support can inhibitknee flexion or the like.

FIGS. 2D-2F show another example of the second portable arm support 200.As described herein, the portable arm support 200 can include an armrecess 120, and the arm recess 120 can be sized and shaped to receivethe arm 180 of the patient. The cuffs 110A, 110B and the base sections140A, 140B can cooperate to position the arm 180 away from a midline ofa body of the patient.

The base sections 140A, 140B can be combined as a unitary member (e.g.,a single piece, the like). The cuffs 110A, 110B can be combined as aunitary member. The cuffs 110A, 110B (or the base sections 140A, 140B)can inhibit the range of motion of the arm 180 of the patient. The cuffs110A, 110B can include a cushion

The cuffs 110A, 110B can include one or more straps 130, for instance tosecure the arm 180 of the patient within the portable arm support 200.In an example each of the cuffs 110A, 110B can include the strap 130.The strap 130 can extend across the arm recess 120. The strap 130 canhelp discourage a patient from removing their arm 180 from the secondportable arm support 200. The second arm support 200 can allow a patientto move their arm 180 within the arm recess 120, for instance to improvepatient comfort. The arm support 200 can help maintain the arm 180within a limited range of motion, while allowing the patient with somedegree of movement within the arm recess 120, for instance to improvepatient comfort. For example, blood filtration therapy can be conductedover a period of multiple hours, or over a period of multiple days.Allowing a patient to move their arm with the limited range of motioncan help improve patient comfort during the blood filtration therapy.Accordingly, the portable arm support 200 can improve the comfort of thepatient during blood filtration therapy, and can improve the blood flowin the arm 180 of the patient during therapy, for instance to helpreduce or inhibit occlusion of a vein in the arm 180 of the patient (orextracorporeal components of the blood filtration system, for instance afilter or a blood circuit).

The base section 142 and side members 144 can define a patient recess230. The patient recess 230 can receive a portion of the patient (otherthan the arm 180), for instance to allow the patient (or a healthcareprovider, or the like) to position the portable arm support 200 closerto the patient. The patient recess 230 can be located on a side of thearm support 200, and the arm recess 120 can be located on a top of thearm support 200 (e.g., the patient recess 230 can be offset from the armrecess 120). In an example, a patient's torso can be partially receivedin the arm recess 230, for instance to allow the patient's arm to belocated in a more comfortable (or natural) position. The patient's arm180 can be received in the arm recess 120 while the patient's torso isreceived in the patient recess 230.

The catheter 190 can be included in a blood circuit 250, and the bloodcircuit 250 can be included in a blood filtration system. The bloodcircuit 250 can include one or more tubes 260, and blood can flow withinthe tubes 260 during blood filtration therapy. The portable arm support200 can include one or more blood circuit guides 240. In an example theblood circuit guide 240 can include (but is not limited to) a clip,clamp, recess, notch, hook, protrusion, eyelet, passage, or the like.The blood circuit guide 240 can receive a portion of the blood circuit250, and the portion of the blood circuit 250 can be captured by theblood circuit guide 240 to help maintain the location of the bloodcircuit 250 with respect to the portable arm support 200. For example,one or more of the tubes 260 can be captured by the blood circuit guide240 to prevent the tubes 260 from being tangled, pinched, displaced, orthe like. Maintaining the location of the blood circuit 250 with respectto the portable arm support 200 can help improve the performance of theblood filtration system, for instance by preventing an occlusion of theblood circuit 250 due to patient movement.

FIGS. 3A-3C show an example of a third portable arm support 300. Theportable arm support 300 can include a cuff 110, and the cuff 110 can besized and shaped to engage with an arm 180 of a patient. For instance,the cuff 110 can include an arm recess 120. The cuff 110 can be curvedto provide the arm recess 120. Additionally, the cuff 110 can include astrap 130 to secure the cuff 110 to the arm 180 of the patient. A firstend (e.g., fixed end) of the strap 130 can be coupled to the cuff 110,and a second end (e.g., a free end) of the strap 130 can be selectivelycoupled with the cuff 110. For instance, the strap 130 can include ahook and loop fastener, and the hook and loop fastener of the strap 130can engage with a corresponding hook and loop fastener of the cuff 110to selectively couple the strap 130 with the cuff 110. The arm 180 ofthe patient can be positioned in the arm recess 120 and the strap 130can be engaged around the arm 180 and coupled with the cuff 110 tosecure the cuff 110 to the arm 180 of the patient.

The portable arm support 300 can include a base 140, and the base 140can be configured to engage with the patient (e.g., a torso of thepatient) and/or a foundation surface (e.g., a bed, couch, gurney, or thelike). For instance, the base 140 can abut against the torso of thepatient, and rest upon a bed that the patient is lying on (e.g., whenthe patient is in a supine position). In another example, the base 140can be coupled with the foundation surface and the arm support 300(e.g., the base 140 is secured to, or rested upon, a bed). The base 140can include a flat bottom, and can include side members that can becoupled with the flat bottom. The side members that slant toward eachother, for instance to provide a wedge.

The portable arm support 300 can include an elastic member 310, and theelastic member 310 can couple the cuff 110 with the base 140. Theelastic member 310 can allow the cuff 110 to be repositioned relative tothe base 140. In an example, the portable arm support 300 can include aninflatable member 320, and the inflatable member 320 can displace thecuff 110 relative to the base 140. For instance, the inflatable member320 can be located between the cuff 110 and the base 140. The inflatablemember 320 can be inflated and expand and accordingly cause the cuff 110to displace relative to the base 140. The elastic member 310 can allowthe cuff 110 to displace relative to the base 140 while maintaining thecoupling between the cuff 110 with the base 140. Displacing the cuff 110relative to the base 140 can facilitate adjustment of the location ofthe arm 180 relative to the midline of the body of the patient, andlocate the arm in a specified orientation.

The portable arm support 300 can be secured to the arm 180 of thepatient proximate the elbow of (e.g., around) the patient. Securing theportable arm support 300 proximate to the elbow of the patient canprevent elbow flexion (e.g., bending) and help maintain blood flowwithin the blood stream of the patient. Accordingly, the portable armsupport 300 maintains the position of the arm 180 of the patient in aspecified orientation. Additionally, when the arm 180 is in the armrecess 120, the portable arm support 300 can prevent arm adduction, andaccordingly improve the blood flow of the patient.

FIGS. 4A-4C show an example of a fourth portable arm support 400. Theportable arm support 400 can include an elongated member 410 having afirst end 420A and a second end 420B. In some examples, the elongatedmember can be a tube or cylindrically shaped. The elongated member 410can include a padding (e.g., low durometer) material. Additionally, theelongated member 410 can include a flexible material (e.g., a textile,for instance cotton) that facilitates wrapping the elongated member 410around the arm 180 of the patient (e.g., the elongated member 410 canspiral around the arm 180).

The first end 420A can include arm straps 430 that facilitates securingthe elongated member 410 to the arm 180 of the patient. The arm straps430 can include a hook and loop fastener to facilitate coupling the armsstraps 430 together (e.g., around the arm 180). Additionally, the armstraps 430 can include an elastic material. The elastic material or thehook and loop fasteners can allow for the arm straps 430 to accommodatearms 180 of varied sizes (e.g., a range of sizes between a child and anadult) to provide an adequate fit.

Additionally, the portable arm support 400 can include a protector 440,for example the protector 440 can be located proximate the first end420A. The protector 440 can be configured to protect (e.g., cover,shield, obscure, or the like) the catheter 190 (shown in FIG. 4C) frombeing interacted with or compressed. The protector 440 can inhibitdislodging of the catheter 190 or maintain blood flow within thecatheter 190. Accordingly, the portable arm support 100 improves bloodflow in the blood filtration system and reduces instances oflabor-intensive reinsertion of the catheter 190. For instance, theportable arm support 400 can protect against the patient reducing bloodflow in the arm by bending its elbow, and from externally compressingthe catheter 190 (e.g., compressing a line in communication with thecatheter 190).

The protector 440 optionally includes a first spacer 450A and/or asecond spacer 450B. In an example, the spacers 450A, 450B can be spacedapart and can straddle the catheter 190 to inhibit interaction with thecatheter 190 (e.g., by the patient). In another example, the spacers450A, 450B can reduce compression of the catheter 190 because thespacers 450A, 450B can absorb compressive forces applied to a regionproximate the catheter. For instance, the spacers 450A, 450B can includea padding material (e.g., foam, low durometer material, or the like)that compresses in response to an applied force. In an example, theprotector 440 covers the catheter 190 and reduces forces that act uponthe catheter 190, for example when the patient moves and lays on its arm180. As described herein, the portable arm support 400 can be secured toa patient, for example to protect the catheter 190 or position the arm180 in a specified orientation. In an example, the portable arm support400 can include a thumb hold 460, and the thumb hold 460 can be locatedproximate the second end 420B. The thumb hold 460 can be secured to athumb of the patient, and the elongated member 410 can be wrapped aroundthe patient to position the arm 180 in a specified orientation(including, but not limited to, away from a midline of the body of thepatient, for instance, abducting and/or elevating the arm 180). The armstraps 430 can be secured around the arm 180 of the patient (e.g.,proximate a bicep or tricep of the patient) to accordingly secure theportable arm support 400 to the arm 180 of the patient. Accordingly, thearm support 400 can be secured to the patient along one or more points(e.g., at a bicep, elbow, wrist, hand, finger, or the like).Additionally, the arm support 400 can be contained to one region of thepatient (e.g., above the elbow, below the elbow, at the elbow), or asshown in FIG. 4C span one or more regions of the patient (e.g., from thebicep to the thumb, or from the shoulder to the thumb).

Referring again to FIGS. 4A-4C, the portable arm support 400 can includea cushion 470. The cushion can include a circular, square, toroidal, orother geometric cross section. In another example, the cushion caninclude an irregular cross section corresponding to an amorphous shape.The cushion 470 can be coupled with the elongated member 410 to provideadditional spacing between the elongated member 410 and the patient (ora foundation surface, for example a bed). In an example, a firstcoupling member 480A and a second coupling member 480B can include hookand loop fasteners, and the coupling members 480A, 480B are selectivelyengaged to couple the cushion 470 with the elongated member 410. Thecushion 470 can be positioned between the midline of the body of thepatient and the arm 180 to space the arm 180 apart from a midline of thebody (e.g., between a torso of the patient and the arm 180). Theportable arm support 400 can include removable covers on the elongatedmember 410 and the cushion 470. The removable covers can be single-use,and the portable arm support 400 can include reusable inserts that areplaced into the removable covers. Accordingly, the portable arm support400 can be used with multiple patients while reducing waste, In anexample, a first set of removable covers can be discarded for sanitationpurposes and the reusable inserts can be placed inside a second set ofremovable covers.

In another example, the portable arm support 400 can include a malleablespine within the elongated member 410. For instance, the malleable spinecan be located within the reusable insert associated with the elongatedmember 410. The malleable spine can be formed in a specified shape(e.g., a spiral) and retain the specified shape. In an example, a healthcare provider can wrap the elongated member 410 around the arm 180 andhave the elongated member 410 engage with an elbow of the patient. Themalleable spine can maintain the position of the elongated member 410with respect to the arm 180 patient, for instance when the patient movesits arm 180. For example, the malleable spine can maintain the positionof the elongated member 410 proximate the elbow, and thereby reduceelbow flexion of the patient. In an example, the malleable spine caninclude a metal wire (e.g., copper, aluminum, or the like). In anotherexample, the malleable spine can include a series of rigid links thatare interconnected and repositionable with respect to each other (e.g.,the rigid links have an interference fit that allows the rigid links tomaintain the specified shape).

FIGS. 5A-5C show an example of a fifth portable arm support 500. The armsupport 500 can include a constricting band 510 having a first side520A, a second side 520B, a first end 525A, and a second end 525B. Thesides 520A, 520B and the end 525B can be closed (e.g., sealed, crimped,or the like), and the end 525A can be open to provide a pouch 530.Additionally, the constricting band 510 can have an outer wall 540A andan inner wall 540B. The inner wall 540A can be configured to engage withthe arm 180 of the patient.

The portable arm support 500 can include an inflatable member 550, andthe pouch 530 can be configured to receive the inflatable member 550.The inflatable member 550 can be inflated (e.g., with air) and expand.The inflatable member 550 can provide a cushion and displace a forceapplied to the outer wall 540A. Accordingly, the inflatable member 550can help protect the catheter 190 when the portable arm support 500 issecured to the arm 180 of the patient. Protecting the catheter caninhibit the removal or dislodging the catheter 190 from the arm 180 andreduce the need for labor-intensive reinsertion of the catheter 190.

The arm support 500 can include or define one or more windows 560. In anexample, the constricting band 510 can define the windows 560, and thewindows 560 can extend through the walls 540A, 540B. The windows 560 canfacilitate access to (e.g., viewing interaction with, physicalengagement with, or the like) the catheter 190 when the arm support 500is secured to the arm 180 of the patient. Access to the catheter 190 canbe desirable to ensure the catheter 190 is in the intended location, andto observe for potential complications (e.g., bleeding, swelling,bruising, or the like). The inflatable member 550 can include atransparent material or an opaque material that facilitates viewing thearm 180 through the windows 560 when the inflatable member is includedin the portable arm support 500. The window 560 can extend through thearm support 500 (e.g., the window can be open, or the like). The window560 can have a variety of profiles. For example, the window 560 can bedefined by the arm support. For example, the window 560 can besurrounded by material for the arm support 500 (e.g., the arm support500 can enclose all sides of the window 560.

The one or more straps 130 can be coupled to the constricting band 510,for instance the straps 130 can be coupled to the first side 520A. Thestraps 130 can selectively couple with the constricting band 510 tosecure the constricting band 510 to the arm 180 of the patient. Forinstance, the straps 130 can include hook and loop fasteners that engagewith the constricting band 510 to secure the band 510 to the arm 180.The constricting band 510 can be secured to the arm 180

The side 520A of the constricting band 510 can be displaceable relativeto the second side 520B, and the displacement of the side 520 relativeto the side 520B can provide an arm recess 580 that engages with the arm180 of the patient. Displacement of the side 520A relative to the side520B can expand or contract (e.g., vary the size of) the arm recess 580.

In an example, the arm support 500 can be secured to the arm 180 of thepatient, for example proximate the elbow of the patient. Locating thearm support 500 proximate the elbow of the patient can help inhibitelbow flexion of the patient and improve the blood flow of the patient.Additionally, the arm support 500 can protect the catheter 190. thecatheter 190 from being interacted with or compressed. The portable armsupport 100 can inhibit dislodging of the catheter 190 or maintain bloodflow within the catheter 190. Accordingly, the portable arm support 100improves blood flow in the blood filtration system and reduces instancesof labor-intensive reinsertion of the catheter 190.

Additionally, the arm support 500 can include the circuit guides 240that are configured to retain portions of the blood circuit 250 (e.g.,withdrawal or infusion lines) of a blood filtration system. The circuitguides 240 can prevent the blood circuit 250 from being compressed,tangled, or the like. Accordingly, the circuit guides 240 facilitateblood flow within the blood circuit 250.

In some examples, the arm support 500 can include one or moreconstricting regions that are operated (e.g., by a controller includingprocessing circuitry) to expand (e.g., loosen) and contract (e.g.,tighten). The expansion and contraction of the constricting regions canperistaltically encourage blood flow (e.g., venous return) in the arm180 of the patient, for example by increasing blood pressure in the arm180. In an example, the constricting regions can be located proximal(e.g., at a shoulder or bicep) and distal (e.g., at a forearm or wrist)on the arm 180 of the patient. The constricting regions can be operatedto encourage blood flow by increasing the blood pressure in one or morelocations of the patient. In another example, a tourniquet can belocated near a shoulder and operate in conjunction with the constrictingregions to encourage blood flow.

A controller can operate the constricting regions (or the tourniquet) tosynchronize constricting regions. In an example, the controller canoperate a first constricting region (e.g., by tightening a band, strap,or the like) above an elbow of a patient, and can operate a secondconstricting region below the elbow of the patient. The controller canoperate the constricting regions to tighten the first constrictingregion and the second constricting region at (or near) the same point intime. In another example, the controller can operate the constrictingregions to loosen the first and second constricting regions at (or near)the same point in time. In yet another example, the controller canoperate the constricting regions to tighten the first constrictingregion, while the second constricting region is loosened. In still yetanother example, the controller 102 can operate the constricting regionsto tighten the second constricting region, while the first constrictingregion is loosened.

The portable arm support 500 can include one or more heating elementsthat generate heat. The heating elements can heat the arm 180 of thepatient, for instance to increase blood flow in the patient. In anexample, the heating elements cause venodilation in the arm 180 of thepatient which can increase venous flow in the arm 180.

In another example, the arm support 500 can include a reference point590. The reference point can be a marking on a surface of the armsupport (e.g., a dot, a grid, a barcode, or the like) that can bemonitored (e.g., observed by an optical sensor in communication with acontroller) to determine a location of the patient, or a location of thearm 180 of the patient. In an example, the reference point 590 can bemonitored to determine an orientation of the arm 180 with respect to thepatient (e.g., if the arm 180 is elevated, flexed, or the like). In yetanother example, the reference point 590 includes one or more positionsensors (e.g., an accelerometer, or the like) and the position sensorcan be in communication with a controller (e.g., with a wired orwireless communication pathway). The position sensor can monitor themovement of the patient, for example by determining acceleration of aportion of a body of the patient (e.g., an arm). Accordingly, theaccelerometer can facilitate determining the location or orientation ofthe patient, including, but not limited to the arm 180 of the patient.

FIGS. 6A-6C show an example of a sixth portable arm support 600. Theportable arm support 600 can include the constricting band 510 (e.g., acuff, a sleeve, or the like). The portable arm support 600 includes thefirst side 520A and the second side 520B. The first side 520A can bebiased toward the second side 520B. In an example, the constricting band510 can include a spring steel material imbedded within the constrictingband 510 Accordingly, the first side 520A can be biased towardengagement with the second side 520B. The sides 520A, 520B can beseparated, and the arm 180 can be inserted into the arm recess 580. Asshown in FIG. 5C, a gap 610 can be located between the sides 520A, 520Bwhen the bias of the constricting band 510 is overcome. The strap 130can selectively couple with the constricting band 510 (e.g., with a hookand loop fastener to tighten the constricting band 510). The portablearm support 600 can include spacers 620A, 620B that space the inner wall540B away from the arm 180. Accordingly, the spacers 620A, 620B caninhibit compression of the catheter 190. Additionally, the arm support600 can protect the catheter 190 from being interacted with orcompressed. The portable arm support 100 can inhibit dislodging of thecatheter 190 or maintain blood flow within the catheter 190.Accordingly, the portable arm support 100 improves blood flow in theblood filtration system and reduces instances of labor-intensivereinsertion of the catheter 190.

Further, the portable arm support 600 can include the windows 560. In anexample, the constricting band 510 can define the windows 560, and thewindows 560 can extend through the walls 540A, 540B. The windows 560 canfacilitate access to the catheter 190 when the arm support 500 issecured to the arm 180 of the patient. Access to the catheter 190 can bedesirable to ensure the catheter 190 is in the intended location, and toobserve for potential complications (e.g., bleeding, swelling, bruising,or the like). A transparent material (e.g. a polymer, for instanceplastic) can be included in the window to facilitate viewing thecatheter 190 (and the catheter insertion site) while providingprotection to the catheter 190 (e.g., protecting the catheter 190 frominteraction by the patient).

FIGS. 7A-7C show an example of a seventh portable arm support 700. Theportable arm support 700 can include a shell 705 and the shell can besoft (e.g., include a textile material) or the shell 705 can be rigid.The portable arm support 700 can include the constricting band 510, andthe constricting band 510 includes the sides 520A, 520B and the ends525A, 525B. The constricting band 510 can include a first flap 710A anda second flap 710B. A biasing member 720 can be coupled between thefirst flap 710A and the second flap 710B. The biasing member (e.g., anelastic material, spring, or the like) can he configured to bias thefirst flap 710A toward the second flap 710B when the first end 525A isdisplaced relative to the second end 525B. In an example, when a patientbends its elbow (e.g., the patient attempts elbow flexion), the biasingmember 720 biases (e.g., encourages) the patient to extend its arm 180.Accordingly, the portable arm support improves blood flow in the arm 180by encouraging the patient to maintain its arm 180 in a specifiedorientation.

The portable arm support 700 can include the straps 130, and the straps130 can facilitate the securing of the portable of the arm support 700to the arm 180 of the patient. In some examples, the straps 130 candefine the window 560. Additionally, the straps 130 can be configured tostraddle the catheter 190 and help protect the catheter 190. Forinstance, the straps 130 can help maintain the location of the catheter190 with respect to the arm 180 of the patient.

The side 520A of the constricting band 510 can be displaceable relativeto the second side 520B, and the displacement of the side 520 relativeto the side 520B can provide an arm recess 580 that engages with the arm180 of the patient. Displacement of the side 520A relative to the side520B can expand or contract (e.g., vary the size of) the arm recess 580.

FIGS. 8A-8C show an example of an eighth portable arm support 800. Theportable arm support 800 can include the constricting band 510, and thestrap 130. The strap 130 can include coupling members 830 to secure theportable arm support 800 to the arm 180 of the patient.

Additionally, the portable arm support can include the spacers 620A,620B, and the spacer 620A can be spaced apart from the spacer 620B. Theportably arm support 800 can include a catheter recess 810 locatedbetween the spacers 620A, 620B. The catheter recess 810 can beconfigured to receive the catheter 190. In this example, when thecatheter 190 is positioned in the catheter recess 810, the catheter isprotected from interaction and/or compression.

Further, the side 520A of the constricting band 510 can be displaceablerelative to the second side 520B, and the displacement of the side 520relative to the side 520B can provide an arm recess 580 that engageswith the arm 180 of the patient. Displacement of the side 520A relativeto the side 520B can expand or contract (e.g., vary the size of) the armrecess 580.

Still further, the portable arm support 800 can include a cushion 820,and the cushion 820 can be coupled with the strap 130. The cushion caninclude a padding material (e.g., a foam or other lower durometermaterial). The cushion 820 can dissipate forces applied to the portablearm support (e.g., by a patient) and protect the catheter 190 (and thecatheter insertion site). In some examples, the spacers 620A, 620B canextend from the cushion 820. Still yet further, the spacers 620A, 620Bcan extend into the arm recess 580 to allow the spacers 620A, 620B toengage with the arm 180.

FIGS. 9A-9E show an example of a ninth portable arm support 900. The armsupport 900 can be secured to the arm 180 of a patient, for instance tolimit a range of motion of the arm 180. Limiting the range of motion ofthe arm 180 can reduce compression of vasculature (e.g., a vein, or thelike) in the arm 180, and can prevent occlusion of extracorporealcomponents, for example the blood circuit 250. The blood circuit 250(and the portable arm support 900) can be included in a blood filtrationsystem 910. The blood filtration system 910 can provide blood filtrationtherapy, for example by removing blood from the blood stream (e.g.,venous circulation) of a patient and separating plasma water andelectrolytes from erythrocytes (e.g., red blood cells) and other bloodconstituents with a filter.

The portable arm support 900 can include a shell 920, and the shell 920can include one or more shell segments 930, for example a first shellsegment 930A and a second shell segment 930B. In an example, the arm 180can be inserted into the arm recess 580 of the arm support 900. Thefirst shell segment 930A can be secured above an elbow of a patient(e.g., proximate a bicep or tricep, or the like), and the second shellsegment 930B can be secured below an elbow of the patient (e.g.,proximate a forearm, or the like). The shell 920 can include a nylonmaterial, and the shell 920 can be rigid, for instance to providemechanical support to the portable arm support 900.

The portable arm support 900 can include one or more hinges 940, and thehinge 940 can interconnect the first shell segment 930A with the secondshell segment 930B. The hinge 940 can facilitate relative motion betweenthe segments 930A, 930B. For example, the segments 930A, 930B can moverelative to each other when the portable arm support 900 is secured tothe arm 180 of a patient. The patient can move its arm 180 (e.g.,flexion, extension, or the like), and the segments 930A, 930B can movewith the arm 180. Accordingly, the portable arm support 900 can providea range of motion for the arm 180 when the support 900 is secured to thearm 180.

The portable arm support 900 can include one or more stops 950, forinstance a first stop 950A. The stops 950 can limit the relative motionbetween the segments 930A, 930B. For instance, the stop 950A can limitthe range of motion for the arm 180 when the portable arm support 900 issecured to the arm 180. Limiting the range of motion of the arm 180 canimprove the performance of the blood filtration system 910, for exampleby inhibiting the occlusion of the patient's vasculature, or one or morecomponents of the system 910 (e.g., the catheter 190, the blood circuit250, a filter or the like). The stops 950 can inhibit flexion of the arm180, or the stops can inhibit extension of the arm 180.

One or more of the shell segments 930A, 930B can include the stops 950.The stops 950 can project from one or more of the shell segments 930A,930B to limit the relative motion between the shell segments 930A, 930B.For example, (and as shown in FIG. 9B) the stop 950A can project fromthe second shell segment 930B. The stop 950A can be located proximate tothe hinge 940A. The stop 950A can engage with a portion of the firstshell segment 930A to limit the relative motion between the shellsegments 930A, 930B. In an example, the patient can move its arm, andthe shell segments 930A, 930B can move relative to each other when thearm support 900 is secured to the arm 180. The stop 950A can engage withan edge 935 of the first shell segment 930A to limit the relative motionbetween the shell segments 930A, 930B. Accordingly, the stops 950 canlimit the range of motion of the arm 180 when the arm support 900 issecured to the arm 180 because the stops limit the relative motionbetween the shell segments 930A, 930B. In an example, the stops 950 helpthe arm support 900 inhibit flexion (or extension) of the arm 180 whenthe arm support 900 is secured to the arm 180.

The arm support 900 can include the biasing member 720, and the biasingmember 720 (shown in broken lines in FIG. 9C) can bias the shellsegments 930A, 930B to a specified configuration. For example, thebiasing member 720 can help the arm support 900 encourage a patient toextend its arm 180, or help to discourage flexion of the arm 180. Forexample, the biasing member 720 can be coupled between the first shellsegment 930A (that can include the first flap 710A) and the second shellsegment 930B (that can include the second flap 710B). The biasing member720 can bias the shell segments toward an extended configuration. Thebiasing member 720 can bias the first flap 710A toward the second flap710B, for example when the first end 510A of the arm support 900 isdisplace relative to the second end 510B of the arm support 900.

In an example, a spring biases the shell segments 930A, 930B so that thearm support 900 provides encouragement to the patient to extend the arm180 (and discourages flexion of the arm 180). In another example, thebiasing member 720 includes an elastic member that biases the flaps710A, 710B together. When the arm support 900 is secured to the arm 180of the patient, the biasing member 720 helps encourages the patient toextend its arm 180, and thereby helps improve blood flow in the arm 180and the blood circuit 250.

The portable arm support 900 can be symmetrical, for instance to allowthe arm support 900 to be secured to either a left arm, or a right arm.The portable arm support 900 can include one or more adjustment features960 that facilitate securing the portable arm support 900 to differentpatients with arms of different sizes. For example, a first adjustmentfeature 960A (e.g., a clip, plug, projection, hook, or the like) canextend from a portion of the shell segment 930A, for instance the flap710A. The shell segment 930A can include a second adjustment feature960B. For example, the second adjustment feature 960B can include one ormore through holes defined by the shell segment 930A. The adjustmentfeature 960A can engage with the adjustment feature 960B to change thesize of the portable arm support 900, for instance to change between asmall configuration, a medium configuration, and a large configuration.Accordingly, the portable arm support 900 can accommodate patients witharms of varying sizes, and can be secured to the arms having varyingsizes.

The portable arm support 900 can include the constricting band 510. Forinstance, the portable arm support 900 can include the strap 130, andthe strap 130 can help secure the arm support 900 to the arm 180. Forexample, the second shell segment 930B can include the second flap 710B.The strap 130 can engage with (e.g., be threaded through, wrap around,or the like) the second flap 710B to secure the arm support 900 to thearm 180 of the patient.

The portable arm support 900 can engage with the catheter 190, forinstance when the catheter 190 is in communication with the vasculature(e.g., in a vein within the arm of the patient, for example a basilicvein, cephalic vein, brachial vein, or the like) of the patient tosecure a location of the catheter 190 with respect to the vasculature ofthe patient (e.g., to maintain the location of a catheter tip withrespect to a wall of the vasculature). The portable arm support 900 canhelp inhibit occlusion of patient vasculature or components of the bloodfiltration system 910.

The portable arm support 900 can include a removeable cover 970. Theremoveable cover 970 can be selectively coupled with the shell 920. Forexample, the cover 970 can include one or more pockets 975, and thepockets 975 can receive portions of the shell 920 and thereby couple thecover 970 with the shell 920. The removeable cover 970 can include atextile material, and the cover 970 can be soft. The shell 920 caninclude a polymeric material, and the shell 920 can be rigid. A personhaving ordinary skill in the art will appreciate that terms such as“soft” and “hard” are defined on a spectrum, and that certain materials(e.g., textiles) can be softer than other materials (e.g., plastic). Theremoveable cover can be patient-specific and can be discarded after asingle-use (or use by a single patient). The shell 920 can be reusable,for instance after a sanitization operation.

The portable arm support 900 can include the one or more windows 560.The one or more windows 560 (e.g., through-holes, openings, cut-outs, orthe like) can extend through the shell 920 and the cover 970, forinstance to provide access to vasculature of the patient (e.g., aportion of the body proximate to a vein, for instance a brachial vein,or the like). Accordingly, the location of the one or more windows 560can correspond to the location of vasculature of the patient. Thecatheter 190 can be inserted through the skin at an insertion location980 (shown in FIG. 9D) into the vasculature, and the windows 560 canprovide access to the vasculature and the catheter 190. The windows canfacilitate access to portions of the catheter 190.

The portable arm support 900 can maintain the location of the catheter190 with respect to the vasculature, for instance by engaging with thecatheter 190 (or the blood circuit 250). In an example, the arm support900 can cover the insertion location 980, for instance to protect theinsertion location 980 from interaction of the patient with theinsertion location 980. The insertion location 980 of the catheter 190can be located proximate to (or within) the window 560, for instance tofacilitate detection of leaks from the insertion location 980. The shellsegment 930A can straddle a hub 290 of the catheter 190, to helpmaintain the location of the hub 290 with respect to the vasculature ofthe patient. For example, the arm support 900 can help maintain thelocation of a catheter tip (when inserted into the vasculature) ortubing in communication with the hub 290.

The portable arm support 900 can include the one or more blood circuitguides 240. The blood circuit guides 240 can receive a portion of theblood circuit 250, and the portion of the blood circuit 250 can becaptured by the blood circuit guide 240 to help maintain the location ofthe blood circuit 250 with respect to the portable arm support 200. Forexample, one or more of the tubes 260 can be captured by the bloodcircuit guide 240 to prevent the tubes 260 from being tangled, pinched,displaced, or the like.

As described herein, certain patient positions and movements can augmentor reduce blood flow in vasculature (e.g., a vein in a limb) and,therefore, into the blood circuit 250 connected to the blood filtrationsystem 910 (e.g., an ultrafiltration device). The system 910 can providefeedback to a patient undergoing blood filtration therapy to encouragethe patient to maintain limb position and optimize blood flow in thelimb. For example, the blood filtration system 910 can provide feedbackto the patient based on one or more physical or physiological parametersor parameters of the system 910 (e.g., resistance in one or more of thewithdrawal line or the infusion line, extracorporeal blood flow,intracorporeal blood flow, withdrawal pressure, infusion pressure,respiratory state, real time imaging of the vein, or the like).

In an example, a patient can move its arm, for example, to a non-optimalposition (e.g., where the access resistance, or resistance to a flow ofblood in the blood circuit, increases). The blood filtration system 910can provide feedback (e.g., a visual signal, audible signal, hapticsignal, or the like) to the patient (or a healthcare provider) toencourage the patient (or healthcare provider) to return the arm 180 toan ideal position for maintenance of blood flow. In another example, theblood filtration system can determine the specified orientation for thearm 180 (e.g., which arm position is best, or a position that enhancesblood flow in the limb, or the like) for a specific patient (e.g., usinga position sensor or sensors, or the like). The system 910 can encouragethe patient to keep their arm in the determined specified orientation.For example, the specified orientation that facilitates maximum bloodflow in the vasculature of the patient (and the blood circuit 250) canvary from a first patient to a second patient. For instance, the firstpatient can have maximum blood flow with its arm in an orientation thatincludes having its arm 180 flexed at 15 degrees. The second patient canhave maximum blood flow with its arm in an orientation that includeshaving its arm 180 flexed at 20 degrees. The system 910 can determinethe specified orientation that facilitates maximum blood flow in thevasculature of the patient, and the system 910 can provide feedback ifthe patient moves its arm 180 away from the specified orientation.

In an example, the portable arm support 900 can include a feedbackdevice 990 (shown in broken lines in FIG. 9E). The feedback device 990(e.g., one or more of a vibration element, a sound emitter, lightsource, or the like) can be in communication with the blood filtrationsystem 910, and the feedback device 990 (and the system 910) can providea notification to the patient (or a healthcare provider) that thepatient has moved its arm 180 in a manner that could occlude blood flowin the vasculature of the arm 180, or occlude blood flow in the bloodcircuit 250). For example, the feedback device 990 can include aposition sensor (e.g., an accelerometer, or the like) that monitorsmovement of the arm 180. The position sensor of the feedback device 990can be in communication with the system 910, and the system 910 canprovide a notification to the patient via the feedback device 990 whenthe system 910 determines that the arm 180 of the patient has moved froma specified orientation.

The feedback device 990 can encourage the patient to maintain a limb ata specified orientation that provides optimal blood flow from the veinto the blood circuit 250 and back to the vein. For example, the feedbackdevice 990 can provide a notification if the patient moves its arm awayfrom its torso. In another example, the feedback device 990 can providea notification if the patient adducts its arm, or moves its arm inflexion. In yet another example, the feedback device 990 can provide anotification if the patient moves its arm away from the specifiedorientation (e.g., if the patient elevates its arm beyond 15 degrees, orthe like). For instance, the specified orientation of the arm caninclude the orientation of the arm that facilitates optimal blood flowthrough the arm 180. The specified orientation of the arm 180 caninclude locating the patient's arm 180 by their torso, slightly abductedand raised 15 degrees from the horizontal. The system 910 can provide anotification to the patient (e.g., with the feedback device 990) whenthe patient moves its arm away from the specified orientation (e.g., bylowering its arm 180, or moving its arm in flexion).

In another example, the system 910 can monitor (e.g., with an opticalsensor, a flow sensor, or the like) the blood flow through the arm 180(or a portion of the blood circuit 250) to determine the specifiedorientation of the arm 180 of the patient. For instance, the system 910can monitor the blood flow through the arm 180 with the arm located inone or more orientations. For example, the arm 180 can be located at afirst arm position (e.g., with the arm 180 elevated 15 degrees). Thesystem 910 can provide a notification to the patient to move its armtoward a second arm position (e.g., with the arm 180 elevated 20degrees). The system 910 can monitor the blood flow rate in the arm 180of the patient with the arm 180 in the first arm position and the secondarm position. The system 910 can guide the patient toward the specifiedorientation with the most blood flow in the arm 180. The system 910 canperiodically determine the specified orientation that provides optimalblood flow in the arm 180 (e.g., an orientation of the arm thatfacilitates the highest blood flow rate in the arm 180).

The system 910 can provide a notification to a user when the system 910determines the patient has moved its arm 180 from the specifiedorientation. For example, the feedback device 990 can emit a sound whenthe patient moves its arm 180 away from the specified orientation (e.g.,in a manner that could occlude blood flow in the arm 180). In anotherexample, the feedback device 990 can vibrate (e.g., provide hapticfeedback) the arm support 900 and notify the patient when the patientmoves its arm 180 from the specified orientation. The system 910 canprovide a notification if the patient moves its arm 180 and the bloodflow rate through the arm 180 decreases. For instance, the system 910can monitor movement of the arm 180, and if the blood flow rate reducesbeyond a flow rate threshold after the patient moved its arm 180, thesystem 910 can provide a notification to the patient to return its arm180 to the specified orientation that facilitates blood flow in the arm180.

The feedback device 990 can allow for the arm support 900 to provide anincreased range of motion to the arm 180 (while limiting the range ofmotion of the arm 180). As described herein, the stops 950 can limit therelative motion between the segments 930A, 930B. The feedback device 990can allow the arm support 900 to provide an increased range of motion tothe arm 180 (while still limiting the range of motion of the arm 180)because the feedback device 990 can encourage the patient to maintainits arm in a specified orientation. For example, the feedback device 990can provide feedback when the patient moves its arm in flexion, forinstance if the arm 180 is bent more than 15 degrees. The feedback cancontinue if the patient maintains its arm 180 in a position other thanthe specified orientation. The stops 950 can provide a limit to therange of motion of the arm 180, for instance when the patient disregardsthe feedback provided by feedback device 990.

The feedback provided by the feedback device 990 (e.g., with anotification) can increase in correspondence to the patient moving itsarm away from the specified orientation. For example, a vibration forcecan increase in intensity as the patient moves its arm in flexion. Inanother example, the feedback device 990 can vibrate in response to thepatient moving its arm 180 within a first range of motion (e.g., armflexion between 15 degrees and 30 degrees, or the like), and thefeedback device 990 can emit a sound (e.g., a chime, beep, tone, or thelike) when the patient moves its arm within a second range of motion(e.g., between 30 degrees and 45 degrees, or the like). The stops 950can provide a third range of motion and inhibit the patient from movingits arm beyond a specified movement threshold (e.g., beyond 45 degrees,or the like). Accordingly, the feedback device 990 can cooperate withstops 950 to allow the arm support 900 to encourage the patient tomaintain its arm 180 in the specified orientation while limiting therange of motion of the arm 180. The components, features, elements, andfunctions of the portable arm supports 100, 200, 300, 400, 500, 600,700, 800, 900 described herein can be combined in one or morecombinations or sub-combinations.

VARIOUS NOTES & EXAMPLES

Aspect 1 is a portable arm support configured to limit a range of motionof an arm of a patient when the portable arm support is secured to thepatient, comprising: a rigid shell sized and shaped for securing to thearm of the patient, wherein the rigid shell inhibits flexion of the armof the patient when the portable arm support is secured to the arm ofthe patient; a removeable cover configured for selective coupling withthe rigid shell; and a window extending through the rigid shell and theremoveable cover, wherein the window provides access to vasculature ofthe patient when the arm support is secured to the patient.

In Aspect 2, the subject matter of Aspect 1 optionally includes whereinthe arm support is configured to engage with a catheter in communicationwith the vasculature of the patient to maintain a location of thecatheter with respect to the vasculature of the patient.

In Aspect 3, the subject matter of any one or more of Aspects 1-2optionally include wherein the rigid shell includes: a first shellsegment; a second shell segment; and a hinge interconnecting the firstsegment with the second segment and facilitating relative motion betweenthe first shell segment and the second shell segment; and wherein theportable arm support is configured to limit the relative motion betweenthe first shell segment and the second shell segment.

In Aspect 4, the subject matter of Aspect 3 optionally includes whereinthe first shell segment is configured for securing above an elbow of thepatient, and the second shell segment is configured for securing belowthe elbow of the patient.

In Aspect 5, the subject matter of any one or more of Aspects 3-4optionally include a stop included in at least one of the first shellsegment or the second shell segment, wherein the stop is configured tolimit the relative motion between the first segment and the secondsegment.

In Aspect 6, the subject matter of Aspect 5 optionally includes whereinthe stop is configured to limit the relative motion between the firstsegment and the second segment to inhibit flexion of the arm when thearm support is secured to the arm of the patient.

In Aspect 7, the subject matter of any one or more of Aspects 5-6optionally include wherein the stop is a first stop, and furthercomprising a second stop that inhibits extension of the arm when the armsupport is secured to the arm of the patient.

In Aspect 8, the subject matter of any one or more of Aspects 5-7optionally include wherein: the stop projects from the second shellsegment and is located proximate to the hinge, and the stop isconfigured to engage with a portion of the first shell segment to limitthe relative motion between the first segment and the second segment.

In Aspect 9, the subject matter of any one or more of Aspects 3-8optionally include wherein the portable arm support is a constrictingband, the first shell segment includes a first flap, the second shellsegment includes a second flap, and the portable arm support includes anarm recess configured to receive the arm of the patient.

In Aspect 10, the subject matter of Aspect 9 optionally includes abiasing member coupled between the first flap and the second flap; andwherein the biasing member is configured to bias the first flap towardthe second flap when a first end of the arm support is displacedrelative to a second end of the portable arm support.

In Aspect 11, the subject matter of any one or more of Aspects 1-10optionally include wherein removeable cover includes a textile material.

In Aspect 12, the subject matter of any one or more of Aspects 1-11optionally include wherein the rigid shell includes a polymericmaterial.

In Aspect 13, the subject matter of any one or more of Aspects 1-12optionally include wherein the removeable cover includes a pocketconfigured to receive a portion of the shell to couple the cover withthe shell.

In Aspect 14, the subject matter of any one or more of Aspects 1-13optionally include one or more straps configured to constrict the armsupport to secure the arm support to the arm of the patient.

In Aspect 15, the subject matter of any one or more of Aspects 1-14optionally include a biasing member configured to bias the arm supporttoward an extended configuration.

In Aspect 16, the subject matter of any one or more of Aspects 1-15optionally include a feedback device that provides a sound or vibrationnotification to the patient when the patient moves its arm away from aspecified orientation.

Aspect 17 is a portable arm support configured to limit a range ofmotion of an arm of a patient when the portable arm support is securedto the patient, comprising: a first base section; a second base sectionangled relative to the first base section; one or more side membersdefining an arm recess configured to receive the arm of the patient; apatient recess configured to receive a portion of the patient other thanthe arm of the patient; and a cuff configured to secure the arm of thepatient within arm recess of the portable arm support.

In Aspect 18, the subject matter of Aspect 17 optionally includes ablood circuit guide configured to capture a portion of a blood circuitto maintain the location of the blood circuit with respect to theportable arm support.

In Aspect 19, the subject matter of Aspect 18 optionally includeswherein the blood circuit guide is coupled to the first base section orthe second base section and is located at an end of the portable armsupport.

In Aspect 20, the subject matter of any one or more of Aspects 17-19optionally include wherein the portable arm support is configured toposition the arm of the patient away from a midline of a body of thepatient.

In Aspect 21, the subject matter of any one or more of Aspects 17-20optionally include wherein the cuff includes a strap configured toextend across the arm recess.

In Aspect 22, the subject matter of any one or more of Aspects 17-21optionally include wherein the cuff includes a cushion.

Aspect 23 is a portable arm support for a patient undergoing a medicalprocedure, comprising: a cuff sized and shaped to engage with the arm ofthe patient; a base coupled with the cuff, wherein the base isconfigured to engage with the patient or a foundation surface; andwherein the cuff and the base cooperate to position the arm of thepatient away from a midline of a body of the patient.

In Aspect 24, the subject matter of Aspect 23 optionally includeswherein the cuff is repositionable with respect to the base.

In Aspect 25, the subject matter of any one or more of Aspects 23-24optionally include an inflatable member located between the cuff and thebase, wherein inflation of the inflatable member displaces the cuffrelative to the base.

Aspect 26 is a portable arm support for a patient undergoing a medicalprocedure, comprising: an elongated member; a cushion located about theelongated member; a thumb hold located proximate to a first end; and aprotector located proximate to a second end of the elongated member, theprotector configured to cover an insertion site of a catheter.

In Aspect 27, the subject matter of Aspect 26 optionally includeswherein the protector includes: a first spacer extending from a surfaceof the protector; and a second spacer extending from the surface of theprotector, wherein the second spacer is spaced apart from the firstspacer to provide a catheter recess, the catheter recess configured toreceive the catheter.

Aspect 28 is a portable arm support for a patient undergoing a medicalprocedure, comprising: a constricting band including an inner wall, theconstricting band having first and second sides; and wherein the firstside is displaceable relative to the second side and displacement of thefirst side relative to the second side provides an arm recess.

In Aspect 29, the subject matter of Aspect 28 optionally includes aninflatable member included in the constricting band.

In Aspect 30, the subject matter of any one or more of Aspects 28-29optionally include wherein the arm recess is expandable withdisplacement of the first side relative to the second side.

In Aspect 31, the subject matter of any one or more of Aspects 28-30optionally include wherein the first side is biased toward the secondside.

In Aspect 32, the subject matter of any one or more of Aspects 28-31optionally include at least one strap, the strap configured to expand orcontract the arm recess.

In Aspect 33, the subject matter of any one or more of Aspects 28-32optionally include a first spacer extending from the inner wall; and asecond spacer extending from the inner wall, wherein the second spaceris spaced apart from the first spacer to provide a catheter recess, thecatheter recess configured to receive the catheter.

In Aspect 34, the subject matter of any one or more of Aspects 28-33optionally include a first flap; a second flap; a biasing member coupledbetween the first flap and the second flap; and wherein the biasingmember is configured to bias the first flap toward the second flap whena first end of the arm support is displaced relative to a second end ofthe arm support.

In Aspect 35, the subject matter of any one or more of Aspects 28-34optionally include at least one window included in the arm support.

In Aspect 36, the subject matter of Aspect 35 optionally includes thewindow includes a translucent or transparent material.

Aspect 37 can include or use, or can optionally be combined with anyportion or combination of any portions of any one or more of Aspects 1through 36 to include or use, subject matter that can include means forperforming any one or more of the functions of Aspects 1 through 36.

Each of these non-limiting aspects can stand on its own, or can becombined in various permutations or combinations with one or more of theother aspects.

The above description includes references to the accompanying drawings,which form a part of the detailed description. The drawings show, by wayof illustration, specific embodiments in which the invention can bepracticed. These embodiments are also referred to herein as “examples.”Such examples can include elements in addition to those shown ordescribed. However, the present inventors also contemplate examples inwhich only those elements shown or described are provided. Moreover, thepresent inventors also contemplate examples using any combination orpermutation of those elements shown or described (or one or more aspectsthereof), either with respect to a particular example (or one or moreaspects thereof), or with respect to other examples (or one or moreaspects thereof) shown or described herein.

In the event of inconsistent usages between this document and anydocuments so incorporated by reference, the usage in this documentcontrols.

In this document, the terms “a” or “an” are used, as is common in patentdocuments, to include one or more than one, independent of any otherinstances or usages of “at least one” or “one or more.”0 In thisdocument, the term “or” is used to refer to a nonexclusive or, such that“A or B” includes “A but not B,” “B but not A,” and “A and B,” unlessotherwise indicated. In this document, the terms “including” and “inwhich” are used as the plain-English equivalents of the respective terms“comprising” and “wherein.” Also, in the following claims, the terms“including” and “comprising” are open-ended, that is, a system, device,article, composition, formulation, or process that includes elements inaddition to those listed after such a term in a claim are still deemedto fall within the scope of that claim. Moreover, in the followingclaims, the terms “first,” “second,” and “third,” etc. are used merelyas labels, and are not intended to impose numerical requirements ontheir objects.

Geometric terms, such as “parallel”, “perpendicular”, “round”, or“square”, are not intended to require absolute mathematical precision,unless the context indicates otherwise. Instead, such geometric termsallow for variations due to manufacturing or equivalent functions. Forexample, if an element is described as “round” or “generally round,” acomponent that is not precisely circular (e.g., one that is slightlyoblong or is a many-sided polygon) is still encompassed by thisdescription.

The above description is intended to be illustrative, and notrestrictive. For example, the above-described examples (or one or moreaspects thereof) can be used in combination with each other. Otherembodiments can be used, such as by one of ordinary skill in the artupon reviewing the above description. The Abstract is provided to complywith 37 C.F.R. § 1.72(b), to allow the reader to quickly ascertain thenature of the technical disclosure. it is submitted with theunderstanding that it will not be used to interpret or limit the scopeor meaning of the claims. Also, in the above Detailed Description,various features can be grouped together to streamline the disclosure.This should not be interpreted as intending that an unclaimed disclosedfeature is essential to any claim. Rather, inventive subject matter canlie in less than all features of a particular disclosed. embodiment.Thus, the following claims are hereby incorporated into the DetailedDescription as examples or embodiments, with each claim standing on itsown as a separate embodiment, and it is contemplated that suchembodiments can be combined with each other in various combinations orpermutations. The scope of the invention should be determined withreference to the appended claims, along with the full scope ofequivalents to which such claims are entitled.

1-36. (canceled)
 37. A portable arm support configured to limit a rangeof motion of an arm of a patient when the portable arm support issecured to the patient, comprising: a rigid shell sized and shaped forsecuring to the arm of the patient, wherein the rigid shell inhibitsflexion of the arm of the patient when the portable arm support issecured to the arm of the patient, the rigid shell including: a firstshell segment; a second shell segment; a hinge interconnecting the firstshell segment with the second shell segment and facilitating relativemotion between the first shell segment and the second shell segment; andwherein the portable arm support is configured to limit the relativemotion between the first shell segment and the second shell segment; aremoveable cover configured for selective coupling with the rigid shell;and a window extending through the rigid shell and the removeable cover,wherein the window provides access to vasculature of the patient whenthe arm support is secured to the patient.
 38. The portable arm supportof claim 37, wherein the arm support is configured to engage with acatheter in communication with the vasculature of the patient tomaintain a location of the catheter with respect to the vasculature ofthe patient.
 39. The portable arm support of claim 37, wherein the firstshell segment is configured for securing above an elbow of the patient,and the second shell segment is configured for securing below the elbowof the patient.
 40. The portable arm support of claim 37, furthercomprising a stop included in at least one of the first shell segment orthe second shell segment, wherein the stop is configured to limit therelative motion between the first segment and the second segment. 41.The portable arm support of claim 40, wherein the stop is configured tolimit the relative motion between the first segment and the secondsegment to inhibit flexion of the arm when the arm support is secured tothe arm of the patient.
 42. The portable arm support of claim 40,wherein the stop is a first stop, and further comprising a second stopthat inhibits extension of the arm when the arm support is secured tothe arm of the patient.
 43. The portable arm support of claim 40,wherein: the stop projects from the second shell segment and is locatedproximate to the hinge, and the stop is configured to engage with aportion of the first shell segment to limit the relative motion betweenthe first segment and the second segment.
 44. The portable arm supportof claim 37, wherein the portable arm support is a constricting band,the first shell segment includes a first flap, the second shell segmentincludes a second flap, and the portable arm support includes an armrecess configured to receive the arm of the patient.
 45. The portablearm support of claim 44, further comprising: a biasing member coupledbetween the first flap and the second flap; and wherein the biasingmember is configured to bias the first flap toward the second flap whena first end of the arm support is displaced relative to a second end ofthe portable arm support.
 46. The portable arm support of claim 37,wherein the removeable cover includes a textile material.
 47. Theportable arm support of claim 37, wherein the rigid shell includes apolymeric material.
 48. The portable arm support of claim 37, whereinthe removeable cover includes a pocket configured to receive a portionof the shell to couple the cover with the shell.
 49. The portable armsupport of claim 37, further comprising one or more straps configured toconstrict the arm support to secure the arm support to the arm of thepatient.
 50. The portable arm support of claim 37, further comprising abiasing member configured to bias the arm support toward an extendedconfiguration.
 51. The portable arm support of claim 37, furthercomprising a feedback device that provides a sound or vibrationnotification to the patient when the patient moves its arm away from aspecified orientation.